Tesla's Q4 2026 delivery outlook reflects uncertainty following Q3 results of 486,532 vehicles, which beat analyst consensus but showed other models including Cybertruck declining sharply year-over-year. Traders weigh maximum factory utilization against shifting priorities toward Full Self-Driving software, robotaxi expansion, and Optimus production, with the company exiting Model S/X lines at Fremont and facing battery supply constraints. Full-year analyst projections near 1.77 million units imply a typical seasonal Q4 lift into the 450k-525k range, yet demand softness for core Model 3/Y and limited near-term contribution from Cybercab fleet sales introduce downside risk. Key catalysts include earnings commentary on capacity plans, regulatory progress on autonomous vehicles, and any inventory or China export trends that could swing outcomes between the closely matched 400k-425k and 475k-500k bands.